package org.example.ocp;

import org.junit.jupiter.api.Test;

/**
 * @author
 * @description 开闭原则
 */
public class Ocp {

    @Test
    void runTest() {
        GraphicEditor graphicEditor = new GraphicEditor();
        graphicEditor.drawShape(new Rectangle());
        graphicEditor.drawShape(new Circle());
        graphicEditor.drawShape(new Triangle());
    }
}


//使用方
class GraphicEditor {
    public void drawShape(Shape s) {
        if (s.m_type == 1) {
            drawRectangle(s);
        } else if (s.m_type == 2) {
            drawCircle(s);
        } else if (s.m_type == 3) {
            drawTriangle(s);
        }
    }

    public void drawRectangle(Shape r) {
        System.out.println(" 绘制矩形 ");
    }

    public void drawCircle(Shape r) {
        System.out.println(" 绘制圆形 ");
    }

    public void drawTriangle(Shape r) {
        System.out.println(" 绘制三角形 ");
    }
}

//基类
class Shape {
    int m_type;

}

//提供方
class Rectangle extends Shape {
   Rectangle() {
       super.m_type=1;
   }
}

//提供方
class Circle extends Shape {
    Circle() {
        super.m_type=2;
    }
}

//提供方
class Triangle extends Shape {
    Triangle() {
        super.m_type=3;
    }
}